#include <REGX52.H>

void Delay(unsigned int xms)		//@12.000MHz
{
	unsigned char i, j;
		while(xms--)
	{
			i = 12;
			j = 169;
			do
		{
			while (--j);
		} while (--i);
	}
}


void main()
{
	unsigned char ledNUM;
	while(1)
	{
		if(P3_1==0)
		{
			Delay(20);
			while(P3_1==0);
			Delay(20);
			ledNUM++;
			P2=~ledNUM;
		}
	}
}	
